CN210120437U - Stator core - Google Patents
Stator core Download PDFInfo
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- CN210120437U CN210120437U CN201921064197.XU CN201921064197U CN210120437U CN 210120437 U CN210120437 U CN 210120437U CN 201921064197 U CN201921064197 U CN 201921064197U CN 210120437 U CN210120437 U CN 210120437U
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- Prior art keywords
- stator core
- bridge
- adjacent teeth
- teeth
- bridge portion
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The utility model provides a stator core both can restrain the increase of part number, can restrain again from the coil towards the leakage current of rotor. A stator core (1) is provided with: an annular yoke (11); a plurality of teeth (12) protruding radially inward from the yoke (11); a plurality of grooves (14) provided between adjacent teeth (12) and having coil housing sections (13); a front end protruding part (15) which is provided at the front end of each tooth (12) and protrudes to both sides in the circumferential direction; and slot openings (16) that are provided between adjacent tip end projections (15) on the radially inner side of each slot (14), and the stator core (1) is formed by laminating plate-shaped steel plates (1 a). Each groove (14) is radially inward of the coil housing section (13), and has a bridge (17) formed integrally with the steel plate (1a), the bridge (17) extending from at least one of the adjacent teeth (12) and having a radial width (W2) smaller than the radial width (W1) of the distal end projection (15).
Description
Technical Field
The utility model relates to a locate stator core (stator core) in the rotating electrical machines.
Background
In a rotating electrical machine mounted on an electric vehicle or the like, there is a possibility that wear of a bearing portion and radio noise (radioise) may occur due to leakage current flowing from a coil (coil) accommodated in a slot (slot) of a stator core to a rotor (rotor).
Therefore, there are proposed: by disposing an electrostatic shielding material, which is a non-magnetic material and is a metal conductor, in an opening portion of each slot of the stator core, a leakage current flowing from the coil to the rotor is suppressed (for example, see patent document 1).
[ Prior art documents ]
[ patent document ]
Patent document 1: japanese patent application laid-open No. 2000-270507
SUMMERY OF THE UTILITY MODEL
[ problem to be solved by the utility model ]
However, in patent document 1, since the electrostatic shielding material is disposed in the opening of each slot of the stator core, there is a problem that: not only the number of parts increases, but also the manufacturing man-hours become complicated.
The utility model provides a stator core both can restrain the increase of part number, can restrain again from the coil towards the leakage current of rotor.
[ means for solving problems ]
The utility model relates to a stator core, include:
a ring-shaped yoke (yoke);
a plurality of teeth (teeth) protruding radially inward from the yoke;
a plurality of slots provided between adjacent teeth and having coil housing portions;
a front end protruding part provided at the front end of each tooth and protruding toward both sides in the circumferential direction; and
a groove opening portion provided between the adjacent front end protruding portions on the radially inner side of each groove,
and the stator core is formed by laminating plate-shaped steel plates, wherein,
each slot has a bridge portion formed integrally with the steel plate on the radially inner side of the coil housing portion,
the bridge portion is provided extending from at least one of the adjacent teeth and has a radial width smaller than that of the leading-end projection.
The utility model discloses a stator core, wherein
The bridge portion extends from both of the adjacent teeth to connect the adjacent teeth.
The utility model discloses a stator core, wherein
The bridge portion has:
a first bridge piece extending from one of the adjoining teeth; and
a second bridge piece extending from the other of the adjoining teeth,
the first bridging piece and the second bridging piece are opposite with a gap,
the gap is smaller than the groove opening portion.
The utility model discloses a stator core, wherein
The bridge portion is provided extending from one of the adjacent teeth and facing the other of the adjacent teeth with a gap therebetween,
the gap is offset from the groove opening in the circumferential direction.
The utility model discloses a stator core, wherein
The bridging part is arranged on the front end protruding part.
[ effects of the utility model ]
According to the utility model discloses, can provide a stator core, both can restrain the increase of part number, can restrain again from the coil towards the leakage current of rotor.
Drawings
Fig. 1 is a sectional view of a main part of a rotating electric machine including a stator core according to a first embodiment of the present invention.
Fig. 2 is a front view of a main portion of the stator core of fig. 1.
Fig. 3 is an enlarged front view schematically showing a main portion of the stator core of fig. 1.
Fig. 4 is an enlarged front view schematically showing a main part of a stator core according to a second embodiment of the present invention.
Fig. 5 is an enlarged front view schematically showing a main part of a stator core according to a third embodiment of the present invention.
Fig. 6 is an enlarged front view schematically showing a main part of a stator core according to a fourth embodiment of the present invention.
[ description of symbols ]
1. 1B, 1C, 1D: stator core
1 a: steel plate
11: magnetic yoke
12: tooth
13: coil housing part
14: trough
15: front end projection
16: groove opening part
17. 17B, 17C, 17D: bridge section
17 a: first bridging piece
17 b: second bridging piece
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to fig. 1 to 6.
As shown in fig. 1, a stator 2 provided with a stator core 1 of the present invention is combined with a rotor 3 provided therein to form a rotating electric machine 4, and is used as, for example, a motor or a generator.
The stator 2 includes: a stator core 1 formed by laminating a plurality of steel plates 1a in an axial direction; and a coil 5 housed in the stator core 1, and the stator 2 is fixed to an inner peripheral portion of a casing (housing), not shown.
The rotor 3 includes: a rotor core (rotor core)6 formed by laminating a plurality of steel plates 6a in the axial direction; a plurality of magnets 7 housed in the rotor core 6; and a rotor shaft, not shown, press-fitted and fixed to a central portion of the rotor core 6, and rotatably supported by the housing via a pair of bearings, not shown.
In the rotating electrical machine 4, there is a possibility that abrasion of the bearing portion and radio noise may occur due to leakage current flowing from the coil 5 housed in the stator core 1 to the rotor 3. The utility model provides a stator core 1 both can restrain the increase of part number, can restrain again from the coil 5 towards the leakage current of rotor 3, and below, to the stator core 1(1B, 1C, 1D) of first embodiment to fourth embodiment, explain according to the preface with reference to the attached drawing.
[ first embodiment ]
As shown in fig. 2 and 3, a stator core 1 according to a first embodiment of the present invention includes: an annular yoke 11; a plurality of teeth 12 protruding radially inward from the yoke 11; a plurality of slots 14 provided between adjacent teeth 12 and having coil housing portions 13; a front end projection 15 provided at the front end of each tooth 12 and projecting toward both sides in the circumferential direction; and a groove opening 16 provided radially inside each groove 14 and between adjacent tip end projections 15.
Each groove 14 has a bridge portion 17 formed integrally with the steel plate 1a radially inward of the coil housing portion 13. According to the bridge 17, a leakage current flowing from the coil 5 to the rotor 3 can be suppressed by shielding between the coil housing 13 and the rotor 3. This can suppress the occurrence of radio noise, wear of the bearing, and the like. Further, since the bridge portion 17 is formed integrally with the steel plate 1a, the number of components can be prevented from increasing, and the number of manufacturing steps can be prevented from increasing.
The bridge 17 extends from at least one of the adjacent teeth 12, and has a radial width W2 smaller than the radial width W1 of the distal end projection 15. According to the bridge portion 17, since the magnetic flux is easily saturated, a decrease in the motor torque due to the provision of the bridge portion 17 can be suppressed. When the radial width W1 of the distal end protrusion 15 is different, the radial width W2 of the bridge 17 may be smaller than the minimum value of the radial width W1.
The bridge portion 17 of the stator core 1 of the first embodiment extends from both of the adjacent teeth 12, and connects the adjacent teeth 12. According to the bridge portion 17, since the adjacent teeth 12 are supported in a state of being supported at both ends, not only the rigidity of the bridge portion 17 can be easily ensured, but also the radial width W2 of the bridge portion 17 can be reduced as much as possible to promote saturation of magnetic flux.
Further, since the slots 14 of the stator core 1 are so-called open slots in which the slot openings 16 are provided between the distal end protruding portions 15 of the adjacent teeth 12, the magnetic flux passing through the bridge portions 17 is saturated, so that the eddy current loss can be reduced as compared with so-called closed slots (closed slots), and the reduction in the motor torque can be suppressed.
[ other embodiments ]
Next, stator cores 1B, 1C, and 1D according to another embodiment of the present invention will be described with reference to fig. 4 to 6. However, only the structure different from the first embodiment will be described, and the same reference numerals as those in the first embodiment are used for the structure common to the first embodiment, and the description of the first embodiment will be referred to.
[ second embodiment ]
As shown in fig. 4, each slot 14 of the stator core 1B of the second embodiment has a bridge portion 17B integrally formed with the steel plate 1a radially inward of the coil housing portion 13, as in the first embodiment, but the shape of the bridge portion 17B is different from that of the first embodiment. Specifically, the bridge portion 17B of the second embodiment includes: a first bridge piece 17a extending from one of the adjacent teeth 12; and a second bridge piece 17b extending from the other of the adjacent teeth 12. The first bridging piece 17a and the second bridging piece 17b are opposed to each other with a gap C1 therebetween, and the circumferential width W3 of the gap C1 is set smaller than the circumferential width W4 of the slot opening 16.
According to the stator core 1B of the second embodiment, since the bridge 17B includes the first bridge piece 17a and the second bridge piece 17B facing each other with the gap C1 smaller than the slot opening 16 interposed therebetween, the parasitic capacitance between the coil 5 and the rotor 3 can be reduced and the leakage current from the coil 5 to the rotor 3 can be suppressed even if the adjacent teeth 12 are not connected.
[ third embodiment ]
As shown in fig. 5, each slot 14 of the stator core 1C of the third embodiment has a bridge portion 17C integrally formed with the steel plate 1a radially inward of the coil housing portion 13, as in the first embodiment, but the shape of the bridge portion 17C is different from that of the first embodiment. Specifically, the bridge portion 17C of the third embodiment extends from one of the adjacent teeth 12 and faces the other of the adjacent teeth 12 with the gap C2 therebetween. The clearance C2 is offset from the groove opening 16 in the circumferential direction.
According to the stator core 1C of the third embodiment, since the bridge portion 17C extends from one of the adjacent teeth 12 and faces the other of the adjacent teeth 12 with the gap C2 circumferentially offset from the slot opening 16 interposed therebetween, the parasitic capacitance between the coil 5 and the rotor 3 can be reduced and the leakage current from the coil 5 to the rotor 3 can be suppressed even if the adjacent teeth 12 are not connected.
[ fourth embodiment ]
As shown in fig. 6, each slot 14 of the stator core 1D of the fourth embodiment has a bridge portion 17D integrally formed with the steel plate 1a radially inward of the coil housing portion 13, as in the first embodiment, but the position where the bridge portion 17D is formed is different from that of the first embodiment. Specifically, the bridge portion 17D according to the fourth embodiment is provided on the distal end protruding portion 15, and connects the distal end protruding portions 15 of the adjacent teeth 12.
According to the stator core 1D of the fourth embodiment, the bridge portion 17D is provided in the distal end protruding portion 15, so that the coil housing portion 13 can be secured wide, and a decrease in the filling rate of the coil 5 can be avoided.
In addition, the above-described embodiments may be modified, improved, and the like as appropriate. For example, in the foregoing embodiments, the radial widths of the bridges are the same, but the radial widths of the bridges may be different.
The present specification describes at least the following matters. In addition, although the corresponding constituent elements and the like in the above-described embodiments are shown in parentheses, the present invention is not limited to these.
(1) A stator core ( stator core 1, 1B, 1C, 1D) comprising:
an annular yoke (yoke 11);
a plurality of teeth (teeth 12) protruding radially inward from the yoke;
a plurality of grooves (grooves 14) provided between adjacent teeth and having coil housing sections (coil housing sections 13);
a tip end protrusion (tip end protrusion 15) provided at the tip end of each tooth and protruding toward both sides in the circumferential direction; and
a groove opening (groove opening 16) provided between the adjacent distal end projections on the radially inner side of each groove,
and the stator cores ( stator cores 1, 1B, 1C, 1D) are formed by laminating plate-like steel plates (steel plates 1a), wherein
Each groove has a bridge portion ( bridge portions 17, 17B, 17C, 17D) formed integrally with the steel plate on the radially inner side of the coil housing portion,
the bridge portion is provided extending from at least one of the adjoining teeth, and has a radial width (radial width W2) smaller than a radial width (radial width W1) of the leading-end projection.
According to (1), since the bridge portion is provided in each groove radially inward of the coil housing portion, leakage current flowing from the coil to the rotor can be suppressed. This can suppress the generation of radio noise, wear of the bearing, and the like. Further, since the radial width of the bridge portion is smaller than the radial width of the distal end projecting portion, the magnetic flux is easily saturated, and a decrease in motor torque due to the provision of the bridge portion can be suppressed.
Further, since the bridge portion is formed integrally with the steel plate, the number of components can be prevented from increasing, and the number of manufacturing steps can be prevented from increasing.
(2) The stator core according to (1), wherein
The bridge portion extends from both of the adjacent teeth to connect the adjacent teeth.
According to (2), the bridge portion extends from both of the adjacent teeth, and connects the adjacent teeth, so that the rigidity of the bridge portion can be ensured.
(3) The stator core according to (1), wherein
The bridge portion has:
a first bridge piece (first bridge piece 17a) provided to extend from one of the adjoining teeth; and
a second bridge piece (second bridge piece 17b) provided extending from the other of the adjoining teeth,
the first bridge piece and the second bridge piece are opposite to each other with a gap (gap C1) therebetween,
the gap is smaller than the groove opening portion.
According to (3), since the bridge portion includes the first bridge piece and the second bridge piece which are opposed to each other with a gap smaller than the groove opening portion, the parasitic capacitance between the coil and the rotor can be reduced and the leakage current can be suppressed even if the adjacent teeth are not connected.
(4) The stator core according to (1), wherein
The bridge portion is extended from one of the adjacent teeth and faces the other of the adjacent teeth with a gap (gap C2) therebetween,
the gap is offset from the groove opening in the circumferential direction.
According to (4), since the bridge portion is provided extending from one of the adjacent teeth and facing the other of the adjacent teeth with a gap circumferentially offset from the groove opening, the parasitic capacitance between the coil and the rotor can be reduced and the leakage current can be suppressed without connecting the adjacent teeth.
(5) The stator core according to (1), wherein
The bridging part is arranged on the front end protruding part.
According to (5), by providing the bridge portion at the distal end projecting portion, the coil housing portion can be secured wide, and a decrease in the coil filling rate can be suppressed.
Claims (5)
1. A stator core comprising:
an annular yoke;
a plurality of teeth protruding radially inward from the yoke;
a plurality of slots provided between adjacent teeth and having coil housing portions;
a front end protruding part provided at the front end of each tooth and protruding toward both sides in the circumferential direction; and
a groove opening portion provided between the adjacent front end protruding portions on the radially inner side of each groove,
and the stator core is formed by laminating plate-shaped steel plates,
the stator core is characterized in that it comprises,
each groove has a bridge portion formed integrally with the steel plate on the radially inner side than the coil housing portion,
the bridge portion is provided extending from at least one of the adjacent teeth and has a radial width smaller than that of the leading-end projection.
2. The stator core according to claim 1,
the bridge portion extends from both of the adjacent teeth to connect the adjacent teeth.
3. The stator core according to claim 1,
the bridge portion has:
a first bridge piece extending from one of the adjoining teeth; and
a second bridge piece extending from the other of the adjoining teeth,
the first bridging piece and the second bridging piece are opposite with a gap,
the gap is smaller than the groove opening portion.
4. The stator core according to claim 1,
the bridge portion is provided extending from one of the adjacent teeth and facing the other of the adjacent teeth with a gap therebetween,
the gap is offset from the groove opening in the circumferential direction.
5. The stator core according to claim 1,
the bridging part is arranged on the front end protruding part.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018131526A JP2020010553A (en) | 2018-07-11 | 2018-07-11 | Stator core |
| JP2018-131526 | 2018-07-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210120437U true CN210120437U (en) | 2020-02-28 |
Family
ID=69152659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921064197.XU Active CN210120437U (en) | 2018-07-11 | 2019-07-09 | Stator core |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2020010553A (en) |
| CN (1) | CN210120437U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113507175A (en) * | 2021-08-04 | 2021-10-15 | 精进电动科技股份有限公司 | Stator structure and flat wire motor |
| FR3128073A1 (en) | 2021-10-12 | 2023-04-14 | Nidec Psa Emotors | Stator of rotating electric machine |
-
2018
- 2018-07-11 JP JP2018131526A patent/JP2020010553A/en active Pending
-
2019
- 2019-07-09 CN CN201921064197.XU patent/CN210120437U/en active Active
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| Publication number | Publication date |
|---|---|
| JP2020010553A (en) | 2020-01-16 |
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